Enhancements to time synchronization in distributed systems
Abstract
A variety of enhancements to a time synchronization protocol for a distributed system(10) or (100) including techniques for improving accuracy by separating a unique timing point (52) from a delimiter 54 for the timing data packet (18). The enhancements include techniques that compensate for jitter associated with communication circuitry in the distributed system (10) or (100) including jitter associated with physical interfaces and gateways in the distributed system. These techniques may involve specialized circuitry in the communication circuitry to compensate for jitter or special processing of received timing data packets or the introduction of follow up packets (16) that inform receiving nodes of measured jitter or a combination of these techniques.

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Every citation, both ways
| Document | Relation | Office | Category | Cited during | Relevant claims |
|---|---|---|---|---|---|
| EP0991216A2 | Cites | European Patent Office (EPO) | E | Search report | 1-5 |
| US4945486A | Cites | United States of America | A | Search report | 1-4 |
| US5566180A | Cites | United States of America | DA | Search report | 1-4 |
| US5640388A | Cites | United States of America | XA | Search report | 5-7 |
| MILLS D L: "MEASURED PERFORMANCE OF THE NETWORK TIME PROTOCOL IN THE INTERNET SYSTEM", NETWORK WORKING GROUP REQUEST FOR COMMENTS, no. 1128, October 1989 (1989-10-01), pages I - II,1-18, XP002970984 | Non-patent | – | – | Search report | – |
| MILLS D L: "INTERNET TIME SYNCHRONIZATION: THE NETWORK TIME PROTOCOL", IEEE TRANSACTIONS ON COMMUNICATIONS, IEEE INC. NEW YORK, US, vol. 39, no. 10, 1 October 1991 (1991-10-01), pages 1482 - 1493, XP000275311, ISSN: 0090-6778 | Non-patent | – | – | Search report | – |
15 members in 4 offices; this record represents the family
Priority claims5
| Document | Office | Kind | Date |
|---|---|---|---|
| 151017 | United States of America | – | |
| 15101798 | United States of America | A | |
| 15101798 | United States of America | A | |
| 151017 | – | – | – |
| US19980151017 | – | – | – |
Members15
| Document | Office | Kind | |
|---|---|---|---|
| EP0986202A2 | European Patent Office (EPO) | A2 | |
| JP2000099485A | Japan | A | |
| US6278710B1 | United States of America | B1 | |
| EP0986202A3This record | European Patent Office (EPO) | A3 | |
| EP1564919A1 | European Patent Office (EPO) | A1 | |
| EP1598968A1 | European Patent Office (EPO) | A1 | |
| EP0986202B1 | European Patent Office (EPO) | B1 | |
| DE69930806D1 | Germany | D1 | |
| DE69930806T2 | Germany | T2 | |
| EP1564919B1 | European Patent Office (EPO) | B1 | |
| EP1598968B1 | European Patent Office (EPO) | B1 | |
| DE69933594D1 | Germany | D1 | |
| DE69933801D1 | Germany | D1 | |
| DE69933594T2 | Germany | T2 | |
| DE69933801T2 | Germany | T2 |
28 legal events, as 2 offices reported them to INPADOC
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Numbers
- Publication
- 0986202
- Publication, DOCDB
- 0986202
- Publication, EPODOC
- EP0986202
- Application
- 99111339
- Application, DOCDB
- 99111339
- Application, EPODOC
- EP19990111339
Titles3
- German
- Verbesserungen der Zeitsynchronisierung in verteilten Systemen
- English
- Enhancements to time synchronization in distributed systems
- French
- Améliorations portées à la synchronisation temporelle dans des systèmes distribués
Classification
- CPC, 7
- H04J3/0661
- G06F1/14
- H04J3/0664
- H04J3/0673
- H04J3/0697
- H04L7/033
- H04L7/04
- IPC, 5
- G06F1 14
- H04J3 06
- H04J3 08
- H04L7 033
- H04L7 04
Designated states2
- Contracting states, 1
- Sweden
- Extension states, 1
- Slovenia